Re: [PATCH 1/1] Set TARGET_PAGE_BITS to be 10 instead of 8 bits

[Peter Maydell]

On Sun, 11 Apr 2021 at 16:15, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> On 4/10/21 10:24 AM, Michael Rolnik wrote:
> > Please review.
>
>
> The first 256b is i/o, the next 768b are ram.  But having changed the page
> size, it should mean that the first 1k are now treated as i/o.
>
> We do have a path by which instructions in i/o pages can be executed.  This
> happens on some ARM board setups during cold boot.  But we do not save those
> translations, so they run much much slower than it should.
>
> But perhaps in the case of AVR, "much much slower" really isn't visible?
>
> In general, I think changing the page size is wrong.  I also assume that
> migration is largely irrelevant to this target.

Migration is irrelevant, but every target benefits from snapshot
save-and-restore, and I think that uses the same codepaths ?

-- PMM